1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72214b0e9ce73325c8ae4325c536efb54ec8b0a62b49db539eb7e96b8bc65886. Chain 2 (Bitcoin): anchored in block 953840 (2026-06-15T22:12:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00074cde-6fd7-4136-bc34-8e7583538747.json and https://artists.proofprofile.net/proofs/artist/00074cde-6fd7-4136-bc34-8e7583538747.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).